![]() Get the class to draw one of the copper atoms to uncover any misconceptions and eliminate them using atomic models and the solar system analogy. Can you now calculate how many protons, neutrons and electrons are in the beaker?.How many atoms are there in the beaker (introduce Avogadro’s constant)?.Measure 64 g of copper filings into a beaker and ask: Periodic trends definitions and trends across periods.īefore introducing the topic of atomic structure, consider working backwards.The protons in the nucleus attract one electron each.The atomic nucleus is the control centre for the atom.For example, sodium can form one ionic bond with chlorine. ![]() The number of electrons that an atom loses or gains determines the number of ionic bonds that it can form.Nuclear attraction is one way (from the nucleus to the electrons). ![]()
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